<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Title</title>
</head>
<body>
  <script type="text/javascript">
    /*function sum(a,b,c){
      return a+b+c
    }*/
    function sum(a){
      return (b)=>{
        return (c)=>{
          return a+b+c
        }
      }
    }
    const result = sum(1)(2)(3)
    console.log(result)
  </script>
</body>
</html>
